USBBCMicro(UNB09)

In late 1984 Acorn moved into the US computer market releasing a fully-upgraded BBC Micro with the model number UNB09. It came with disc, Econet, and speech upgrades as standard and a version of BBC BASIC modified to use American spelling conventions (e.g. COLOR instead of COLOUR).

In order to get FCC class B certification additional RF shielding had to be included, increasing the computer's weight dramatically.

The US venture was not a success, and while 50,000 units were produced (under license by Wong Electronics) the unsold stock was returned to the UK and modified for use with domestic power supplies.

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